@inproceedings{sen2021top,
	title={Top-k eXtreme Contextual Bandits with Arm Hierarchy},
	author={Sen, Rajat and Rakhlin, Alexander and Ying, Lexing and Kidambi, Rahul and Foster, Dean and Hill, Daniel and Dhillon, Inderjit},
	booktitle={Proceedings of the 38th International Conference on Machine Learning},
	pages={9422--9433},
	year={2021},
	editor={Meila, Marina and Zhang, Tong},
	volume={139},
	series={Proceedings of Machine Learning Research},
	month={18--24 Jul},
	publisher={PMLR},
	pdf={http://proceedings.mlr.press/v139/sen21a/sen21a.pdf},
	url={http://proceedings.mlr.press/v139/sen21a.html},
}
